The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2011
Filed:
Aug. 27, 2007
Jiangjian Huang, Guangdong, CN;
Jianfeng Song, Guangdong, CN;
Jiangjian Huang, Guangdong, CN;
Jianfeng Song, Guangdong, CN;
Mornsun Guangzhou Science & Technology Limited, Guangdong, CN;
Abstract
An isolating self-oscillation flyback converter includes a coupling transformer T, a FET TR, a transistor TR, a photoelectric coupling isolator OCand a load feedback circuit Adj. The common polarity terminal of a feedback winding Nfb of the coupling transformer Tis connected to the gate of the FET TRvia a capacitance Cand a resistance R, and connected to the base of the transistor TRvia a capacitance C. The base of the transistor TRis also connected to the emitter of the photoelectric coupling isolator OC. The photoelectric coupling isolator OCis connected to the positive terminal of the output voltage. The opposite polarity terminal of the feedback winding Nfb is connected to the collector of the photoelectric coupling isolator OCvia a resistance R, and connected to ground via a capacitance C. The common polarity terminal of the feedback winding Nfb is also connected to the cathode of a diode D, and the anode of the diode D is connected to ground. A set of windings are removed by forming a loop circuit directly between the feedback winding Nfb and the photoelectric coupling isolator OC